There are different fields of science. In my field (water resources), any scientist that is reasonable knows the climate change is happening, you can see it in any data that spans for last 50 years. We’re focused on how to deal with it, given it’ll get worse. All the future scenarios (from simulations) are worse than history, there’s less worse and more worse depending on how people will act. But I think even the worst case did not have “world war” into consideration. So we might have wayy worse than our predictions. But again, predicting future is hard, there could be effects that we’re not expecting. Specially the current geopolitical scenario when climate change (and greed) is making life hard leading into authoritative regimes which is making it worse on top of previous policies. Which exceeds the linear growth pattern used in the simulations.